What is meant by 'Fascism'? Why did the Italians feel that they had been deceived by the Treaty of Versailles?

'Fascism' means autocracy or dictatorship where the power of the State is vested in one man only and it is obligatory for all the others to obey his orders.

Italy joined the Allies in the First World War to gain territories of Turkey and Germany. But by the Treaty of Versailles, she could get only Southern Tyrol and Trentino, and the Coastal Regions of Dalmatia. She could get no part of the German and Turkish colonial empire.